mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-29 05:00:47 +00:00
17 lines
717 B
MySQL
17 lines
717 B
MySQL
|
DROP TABLE IF EXISTS test.agg_over_nullable;
|
||
|
|
CREATE TABLE test.agg_over_nullable (
|
||
|
|
partition Date,
|
||
|
|
timestamp DateTime,
|
||
|
|
user_id Nullable(UInt32),
|
||
|
|
description Nullable(String)
|
||
|
|
) ENGINE = MergeTree(partition, timestamp, 8192);
|
||
|
|
|
||
|
|
INSERT INTO test.agg_over_nullable(partition, timestamp, user_id, description) VALUES(now(), now(), 1, 'ss');
|
||
|
|
INSERT INTO test.agg_over_nullable(partition, timestamp, user_id, description) VALUES(now(), now(), 1, NULL);
|
||
|
|
INSERT INTO test.agg_over_nullable(partition, timestamp, user_id, description) VALUES(now(), now(), 1, 'aa');
|
||
|
|
|
||
|
|
SELECT groupUniqArray(description) FROM test.agg_over_nullable;
|
||
|
|
SELECT topK(3)(description) FROM test.agg_over_nullable;
|
||
|
|
|
||
|
|
DROP TABLE test.agg_over_nullable;
|